I very recently purchased a pentax k30 dslr along with various lenses and accouterments. For the last few days I've had to figure out how to use old m42 screw mount lenses with the camera along with a Pentax-a zoom and the digital auto zoom lense that originally came with the camera. A few frustrating moments but eventually I figured out most of the mechanics of the camera. At least enough to use the lenses I have, to get some semblance of a photograph. I did find tin foil indispensable for mounting the m42 lenses on the camera (with an adapter).
My sister offered me a 200 mm pentax lens (prime) which should be here in a week or so. That should enable me to "shoot" a few of the neighborhood squirrels and birds.
I realize that a camera won't make me a (much) better photographer but I'm enjoying the learning experience. With the exception of using a pentax k1000 film camera quite a few years ago, my experience with slr's is very minimal. I use linux as an everyday operating system and Shotwell and Rawtherapee are readily available to deal with raw images and jpeg's. Lots to learn with them also but it is interesting and keeps the brain working.
John.
cool, I've started with a Pentax camera myself back in the film era. I love pentax cameras and how they made their ancient lenses work on their new digital bodies, kudos to them.
as for linux, take a look at darktable as well, it's somewhat like lightroom, it helps organising photos and gives you quite a few tools to work with. YouTube is full of tutorials as well, they are very handy.
have fun with the new toy!